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Emissionspectroscopic Investigation of Bci 3 Discharges
Author(s) -
Breitbarth F.W.,
Ducke E.
Publication year - 1990
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150300514
Subject(s) - excited state , excitation , atomic physics , materials science , common emitter , argon , population , electron , kinetics , electron transfer , analytical chemistry (journal) , optoelectronics , physics , chemistry , photochemistry , chromatography , demography , quantum mechanics , sociology
Radiofrequency discharges in neat BCI 3 exhibit 3 broad molecular emissions with intensity maxima at about 305, 350, and 480 nm. The 350 nm system consists of a progression of bands with an average separation of about 130 cm −1 . All three emissions have an identical excitation kinetics in pulse discharges and are, therefore, believed to originate from the same emitter. Arguments are given that the emitter might be electronically excited BCl 2 . The dominant process of BCl(A) formation in neat BCl 3 at low r.f. power is shown to be direct electron impact excitation of BCl(X). A transient excess population of BCl(A 1 II) in BCl 3 /Ar discharges is explained as due to an energy transfer from argon metastables.